| Mount Prospect to Karlovo | 5,247.82 mi (8,445.56 km) |
| Mount Prospect to Karnobat | 5,325.57 mi (8,570.68 km) |
| Mount Prospect to Kavarna | 5,332.22 mi (8,581.38 km) |
| Mount Prospect to Kazanlak | 5,270.35 mi (8,481.81 km) |
| Mount Prospect to Knezha | 5,180.20 mi (8,336.72 km) |
| Mount Prospect to Kostinbrod | 5,182.00 mi (8,339.62 km) |
| Mount Prospect to Kozloduy | 5,154.00 mi (8,294.56 km) |
| Mount Prospect to Kyustendil | 5,188.16 mi (8,349.54 km) |
| Mount Prospect to Levski | 5,224.04 mi (8,407.28 km) |
| Mount Prospect to Lom | 5,134.22 mi (8,262.74 km) |
| Mount Prospect to Lovech | 5,220.59 mi (8,401.74 km) |
| Mount Prospect to Lukovit | 5,197.73 mi (8,364.95 km) |
| Mount Prospect to Lyaskovets | 5,257.79 mi (8,461.59 km) |
| Mount Prospect to Mezdra | 5,183.39 mi (8,341.87 km) |
| Mount Prospect to Momchilgrad | 5,324.37 mi (8,568.75 km) |
